| 초록 |
Highly porous cylindrical-type gas filter media containing copper-manganese oxide catalyst was prepared by roller-dice extrusion method using Cu:MnOx/SiO2 composite precursor, which was obtained by a redox precipitation and subsequent hydrolysis of alkali silicate solution. In a typical preparation nano-sized Cu:MnOx particle was prepared at first by a redox reaction between Mn7+ and Cu2+/Mn2+ aqueous solution, followed by a acid-catalyzed hydrolysis of sodium silicate solution in the presence of CuMnOx particle, leading to Cu:MnOx/SiO2 composite materials with very high specific surface area (SBET) of ＞ 650 m2/g and large pore volume of ~ 0.6 mL/g with the pore dimension of 3 ~ 5 nm. The physical properties such as apparent packing density, pellet hardness, and porous characters (surface area, pore volume, and pore size) along with the gas removal performance (CO, NO2, NH3, and CH3CHO) were investigated in detail. |
